Portable grain-mill



C. LEAVITT. Grinding Mill.

Patented July 6, i852.

ila S CHARLES LEAVITT, OF QUINCY, ILLINOIS.

PORTABLE GRAIN-MILL.

Specification of Letters Patent No. 9,096, dated July 6, 1852.

To all whom it may concern:

Be itknown that I, CHARLES LEAVITT, of Quincy, in the county of Adamsand State of Illinois, have invented certain new and useful Improvementsin Portable Mills for Grinding and Crushing Corn and other Grains,Roots, Fruit, &c.; and I do hereby declare that the following is a fulland exact description thereof, reference being had to the accompanyingdrawings and to the letters of reference marked thereon, of which-Figure l is a perspective view of the entire apparatus. Fig. 2 is avertical section through the mill.

My improvements consist in constructing a portable mill applicable tothe various purposes required by farmers and others, such as crushingcorn and cob together, grinding meal, shelling corn, crushing roots,mashing apples for cider and other like purposes-in such a manner thatit shall be simple and durable, and consisting of few parts, andconsequently be low in cost, so as to bring it within the means of everyfarmer to possess one; also in the easy and simple manner in which itcan be set up and secured for use and again removed, and in its facilityof adjustment and the adaptability of the same machine to the variouspurposes above mentioned. These objects are accomplished by thefollowing means: by making the inner grinding cone the fixed one andcausing the exterior cone or concave to revolve around it, by which aheavy external frame is entirely dispensed with and the whole mill madecapable of being firmly fixed without bolts, on the end of a post, orthe stump of a tree if convenient. The central shaft or spindle and itsstep or journals are also dispensed with, and in the space which theyusually occupy is placed a simple and convenient adjusting screw. Therevolving concave is suspended from but one bearing, which with itsadjusting screw is supported from the fixed inner cone or convex. Thelever for the attachment of the horse combines lightness and strengthwith a very convenient mode of connecting it with the concave of themill.

rlhe mill is adapted to the various purposes above enumerated, as wellas caused to grind or crush to different degrees of fineness, byadjusting the elevation of the concave, which causes the roughenedconical grinding surfaces to approach to or recede from each other.

In the drawings (a) represents a post or stump which is squared at thetop and made to lit a tapered square hole in the piece (o), thussupporting the whole apparatus in a simple and iirm manner, without theuse of bolts or wedges. The piece (b) is the internal cone or grindingconvex of the mill and is grooved and roughened on its exterior in theusual manner, and instead of being made to revolve within a iixed caseas in the ordinary mills, it is itself fixed, and the exterior cone orconcave (c) is made to revolve on it. The internal cone has two uprightssupporting a collar (d) having a square hole through it. In this hole apiece (e) having its lower part squared to it slides up and down, andits elevation is regulated by the screw working in the top of the conerlhe shaft of the screw passes through the piece (e), having a shoulderbelow and a washer and nut above, to prevent. it from either rising orfalling independently of the screw. The upper part of the piece (e)forms a bearing for the collar (g), which is attached by two arms to theconcave (c), which is thus suspended by a bearing which can be adjustedin its elevation by turning the screw (f) by means of the handle (71)).

is a hopper attached to the concave, into which the substances to becrushed or ground are thrown.

The lower extremity of the revolving concave (c) has a rabbet turned onits interior edge, into which a flange (7c) on the interior coneprojects, serving to guide the concave concentrically with the interiorcone and admitting of its being raised and lowered. The flange (lc) iscut away at intervals to allow of the grain, &c., falling through afterhaving been acted on by the mill.

The lever to which the horse is connected for giving motion to the outercone or concave is constructed and attached as follows: Two pieces (Z)are united at their extremities where the horse is to be attached andtheir opposite ends are connected by a short piece (m), thus forming atriangle of sufficient width at the base to embrace the concave (c),which has three pins projecting from its exterior, two of them atopposite sides fitting into notches in the levers (l), for the purposeof readily securing the mill and the third by pressing on the back pieceon the top of a post or stump, Without the 10 lgwzhkeps tlie utrextremity at the proper use of bolts or Wedges, &o., as set forth.

eig t ort e rat. 5 What I claim as my invention and de- CHARLES LEAVITTsire to secure by Letters Patent is Witnesses:

Forming the inner stationary cone With EDWARD EVERETT, a cavity (squareor otherwise) as described, PHILo A. GOODWIN.

